When pairing is attempted but unsuccessful, pen may give a longer "buzz".

One cause of unsuccessful pairing may be incompatible pen firmware. If possible, ensure you have the latest firmware installed on your pen.

It is not advised to pair pens via the iOS device's Bluetooth settings, as the pairing may be "lost".

If you review Bluetooth settings on your iOS device, don't be alarmed if you see your pen listed as "Not connected". This merely indicates that your pen is not sending ink stroke data to your device at that moment.